Arc lamp



NOV 8, 1932. ALEXANDER 1,887,277

ARC LAMP Filed April 30, 1928 1 NV EN TOR.

F055 fl/Vf/INU AZf/Vi/VDEE.

By mmy A TTORNEY.

Nov. 8, 1932 STATES FOCSANEANU ALEXANDER, OF NE'VV' YORK TELEVISICB? CORPQRATION, 1

PATENT OFFICE ABS LAMP Application filed April 30,

invention relates to are lamps and in articular ttheir use in the fields in which 1 have survived the trend of the last years towards incandescent lighting; thus the lamps, in which I intend to introduce my ients, are are lamps for therapeui110 and cinematographic work. i object.) of my invention are, first, to pro e in an lamp, the service of which required for limited periods of time, handiness 1 weight and size and simplicity in operation; end, to be able to disassemble by one simple manipulation, an arc lamp of that l nd, for the purposes of mainte such as cleaning, small adjustments I of the electrodes; third, to eli ainate the current from part when the arc lamp is dised; and fourth, to provide simple draw the arc, when the lamp is to i to operation.

n these objects by the mechanism d in the accompanying drawing in 1 and 2 are partly sectioned top .vs of the shell and of the operative parts or my arc lamp, respectively.

' e 8 shows a sectioned side view of scinbled arc lamp.

do an d 4:7) show sectional end views shell and of the operative part, seen in the directions in which they disassemble,

ctively.

lar numerals refer to similar parts throughout the several views.

To the upper end 1 of the stand is atby a cup-shaped sleeve 2, the unilQELlClZlQ 3, the upper end 4 of which supports the cylindrical part 5 of the shell of my lamp. This cylindrical part 5 is open at one end, the other end it merges into the refl ctor part 6 of the shell. The plate cferebly made of lire-proof insulating mounted. across the inside of the where cyl. 1drical part 5 and reflector 6 meet. Sn the bottom of that plate 7 Figures versal male parts, by wnich the current is transmitted to the plugs 9 on the operative part of L the lamp. To the sleeves 8 are assembled by 1923. Serial No. 273,809.

screws 10 the cable lugs 11, to which connects, by the cables 12 passing through the shell 5 and supports t, the A. C. or D. C. electric current source. Of course, the customary resistance or reactance devices may be connected into the electric circuit to offer regulation for the intensity of the light.

Into the end of the cylindrical part 5 of the shell fits the cover 13 of the operative part of the lamp. A plate 14, similar to plate '7 in part 5, is mounted on the inside of that cover and held in position by three spacing lugs 15 and a central lug 16 in which by screws 17 the plate 14, the cover 13 and the insulated handle 18 are held together. There are the two threaded studs 19 protruding from the sides of cover 13 which fit clearance slots 20 in the end of the cylindrical part 5 of the shell; by knurled nuts 21 on the studs 19 the iperative part may be secured in the shell, in addition to being held by plugs 9 fitting sleeves 8.

These plugs 9 are electrically connected by links 22 to two stationary electrode holders 23 mounted on plate 14. These electrode holders n3 faced by similar electrode holders 25 which are fulcrumed on pins 26 in the forked bracket 27 which is mounted on the top of plate 14. There are extensions 28 on the bottom ends of the swinging electrode holders 25 to which are hinged the rods 29 which carry on their threaded ends the insulated buttons 30. There is a cross-piece 31 on the bottom of the plate l-l in which the rods 29 are slidably supportec and which, on one side, serves as a stop for the adjustable col ars on rods 29 whereas on the other side the compression springs 33 are located between that cross-piece and the insulated buttons on the rods 29.

Normally the tension of those springs 33 holds the collars against the cross-piece 31 and in that position the holes 34 and 35 in the stationary and s 'inging electrode holders are parallel; the electrodes 36 which are set in these holes of th electrode holders by thumb screws are also parallel. Pushing the but tons 3O the ends of rods 29, the swinging electrode holders are moved out of the position parallel with the stationary electrode holders and the ends of the electrodes 36 are thereby brought together and touch. Successive pressing down of the two buttons 30 will therefore serve to draw the are between the electrodes when the lamp is to be set into operation. There are clearance holes 38 in the plate 7 for the electrode holders and electrodes. Otherwise the plate 7 shields all. the operative parts against the heat of the are when the lamp is in operation.

The arrangement shown serves for ser operation of the two electrode units of i lamp, the current from the cables 12 pas through the plugs 9 to the stationary c trode holders, from here through the el .ctrodes to the swinging electrode holders, which are electrically connected to each other by bracket 27, whereby the circuit is closed. It is clear that I do not have to operate my lamp by'two electrode units in series, but I may use only one unit with two electrodes in the operation of my device.

The insulated handle 18 serves to pull the operative part out of the shell. lVhen that operation has been performed, the electric connections to both poles of the current source have been severed at the plugs 9 and the operative part is therefore completely dis connected in electric respects when the device is disassembled, and there is no possibility of harm to the operator while he is adjusting or replacing the electrodes or cleaning the lamp. The means of electric connection between the shelland the operative part do not have to'have the exact shape shown in the drawing, but they may conform in construction to any male and female contacting means used to plug circuits together; or a solid part on either the shell or the operative part may bear down on a tensile part of the other.;in that case it might take the form of a bayonet connection, or one contact may be flat spring, a tensioned' lever or a tensioned piston slidably supported. in annular guide means; or tcnsional means on the shell as well seen the operative part, may be brought to bear upon each other when the apparatus is assembled.

I do not adhere to the specific means shown for drawing the are in all forms of design in which I intend to execute my invention. I may eliminate the use of levers 29, and may bring the extensions 28 on the bottom ends of the swinging electrode holders to a point near the cover 13, or extend t 1cm through holes in the cover and provide insulating means on their ends, by the mar lpulation of which the arc may be drawn. In that case there would, of course, be tensional means on the swinging electrode holders, by means of which the electrode holders would be normally held in the position pa al el to the stationary electrode holders.

It is not necessary that cover 13 and cylindrical part 5 extend so far as to slide into each other. Other means of guiding the shell and the operative part, and of holding them in coaxial alignment, may be used as they are known where electric fixtures are plugged together. Likewise the female receptacles 8 may be completely embedded in the plate 7, or another plate of that kind may cover their sides, so that there is no possibility of touching these parts in the shell when the operative part of my arc lamp has been removed. These protective means may be shaped to conform to the electric code prevailing in the localities where my improve ment is used.

I claim:

1; In an apparatus of the kind described, comprising a shell part, consisting of a reflector bowl and a cylindrical part connected thereto, a transverse insulating plate partitioning said bowl and cylindrical part, adjustable supporting means for said shell fixed to said cylindrical part, rearwardly disposed terminal sleeves for an electric circuit mounted on said plate, an operative part detachably and operatively connectable to said shell part, consisting of a cylindrical cover arranged to insertably register in said cylindrical part and close the rear end thereof, a transverse insulating plate partitioning said cover into front and rear compartments, stationary electrode holders mounted on said cover plate extending forwardly therefrom in said cover front compartment, swinging electrode holders mounted on said cover plate opposite said stationary electrode holders and extending forwardly therefrom in said cover front compartment, electrodes mounted in said stationary holders and said swinging holders, extending forwardly through apertures insaidshell insulating plate into said reflector bowl part, spring restrain-ed means in said cover rear compartment normally holding said swinging electrodes in substanti ally parallel, non-contacting relation to said stationaryelectrodes, means on said cover operable against said spring restraint to swingably contact said swinging electrodes with said stationary electrodes, and contact lugs in said cover front compartment mounted on said cover insulating plate, extending forwardly therefrom, arranged to seat in said terminal sleeves and make detaclr able, mechanical and electrical contact, to electrically energize said electrodes while saic contact is maintained.

2. In an apparatus of the kind described, comprising a shell part, consisting of a reflector bowl and a cylindrical part connected thereto, a transverse insulating plate partitioning said bowl and cylindrical part, rear wardly disposed terminal sleeves for an electric circuit mounted on said plate, an operative part detachably and operatively connectable to said shell part, consisting of a cylindrical. cover arranged to insertably register in said cylindrical part and close the rear end thereof, a transverse insulating plate partitioning said cover into front and rear compartments, stationary electrode holders mounted on said cover plate extending forwardly therefrom in said cover front compartment, swinging electrode holders mounted on said cover plate opposite said stationary electrode holders and extending forwart ly therefrom in said cover front compartment, electrodes mounted in said stationary holders and swinging holders extending forwardly through apertures in said shell insulating plate into said reflector bowl part, pressure actuated, spring restrained means in said cover rear compartment operably connected to said swinging electrode holders, normally holding said swinging electrodes in substantially parallel, non-contacting relation to said stationary electrodes, pressure xerting means on said cover operable against said spring restraint to swingably contact said swinging electrodes with said stationary electrodes, and contact lugs in aid cover front compartment mounted on said cover insulating plate. extending forwardly therefrom, arranged to seat in said terminal sleeves and make detachable, mechanical and electrical contact therewith to electrically energize said electrodes while said contact is maintained.

3. In an apparatus of the kind described, comprising a shell part, consisting of a re flector bowl and a cylindrical part connected thereto, a transverse insulating plate partitioning said. bowl and cylindrical part, rearwardly disposed terminal sleeves for an electric circuit mounted on said plate, an operative part detachably and operatively connectable to said shell part, consisting of a cylindrical cover arranged to insertably register in said cylindrical part and close the rear end thereof, a transverse insulating plate partitioning said cover into front and rear compartments, stationary electrode holders mounted on said cover plate, extending forwardly therefrom in said cover front compartment, swinging electrode holders mounted on said cover plate opposite said stationary electrode holders and extending forwardy therefrom in said cover compartment, elec- -rodes mounted in said stationary holders and winging holders, extending forwardly through apertures in said shell insulating plate. into said reflector bowl part, pressure actuated, spring restrained means in said cover rear compartment operably connected to said swinging holder, normally holding said swinging electrodes in substantially parallel, non-contacting relation to said stationary electrodes, pressure exerting means on said cover, operable against said spring restraint to swingably contact said swingelectrodes with said stationary electrodes, tact lugs in said cover front compartment mounted on said cover insulating plate, extending forwardly therefrom, arranged to seat in said terminal sleeves and make detachable, mechanical and electrical contact therewith, to electrically energize said elec trodes while said contact is maintained, and a handle on said cover part to effect operative engagement of said cover with said shell and disengagement therefrom.

a. In an apparatus of the kind described, comprising a shell part, consisting of a reflector bowl and a cylindrical part connected thereto, a transverse insulating plate partitioning said bowl and cylindrical part, rearwardly disposed terminal sleeves for an electric circuit mounted on said plate, an operative part detachably and operatively connected to said shell part, consisting of a cylindrical cover arranged to insertably register therein and close the rear end thereof, a transverse insulating plate partitioning said cover into front and rear compartments, stationary electrode holders mounted on said cover plate extending forwardly therefrom in said cover front compartment, swinging electrode holders mounted on said cover plate opposite said stationary electrode holders and extending forwardly therefrom in said cover front compartment, electrodes mounted in said stationary holders and swinging holders, extending forwardly through apertures in said shell insulating plate into said reflector bowl part, pressure actuated restraint means in said cover rear compartment, operatively connected to said swinging holders, normally holding said swinging electrodes in substantially parallel, non-contacting relation to said stationary electrodes, pressure exerting means on said cover, operable against said spring restraint to swingably contact said swinging electrodes with said stationary electrodes, contact lugs in said cover front compartment mounted on said cover insulating plate, extending forwardly there from, arranged to seat in said terminal sleeves and make detachable, mechanical and electrical contact therewith, to electrically energize said electrodes while said contact is maintained, and means on said cover to detachably lock said cover and parts carried thereon in operative relation to said shell.

5. In an apparatus of the kind described, comprising a shell part, consisting of a reflector bowl and a cylindrical part connected thereto, a transverse insulating plate partitioning said bowl and cylindrical part, rearwardly disposed terminal sleeves for an elec tric circuit mounted on said plate, an operative part detachably and operativcly connectable to said shell part, consisting of a cylindrical cover arranged to insertably register in said cylindrical part and close the rear end thereof, a transverse insulating plate partitioning said cover in said front and rear compartments, fastening means connected Til to said insulating, partitioning plate and to said cover, retaining said plate in predetermined, spaced, operative relation to one end of said cover, stationary electrode holders mounted on said cover plate extending forwardly therefrom in said cover front coinpartment, swinging electrode holders mounted on said cover plate opposite said stationary electrode holders and extending forwardly therefrom in said cover front compartment, electrodes mounted in said stationary holders and said swinging holders, extending forwardly through apertures in said shell insulating plate into said reflector bowl part, arocker arm connected to said swinging electrodes and extending rearwardly through said cover plate, a rod hinged to the free end of said rocker arm and extending outside of said cover part, to actuate said rocker arm and swing said swinging electrode holder, a bracket mounted on said cover insulating plate anc ei-ztending rearwardly therefrom into the rear cover compartment, slidably supporting said rod, an adjustable step on said rod, adapted to engage with said bracket and limit the swinging movement of said swinging holders and electrodes in one d1- frection, a compression spring intensio-ning engagement with said rod, restraining said swinging holders and electrodes against swinging movement in the opposite direction ---and normally holding said swinging electrodes in substantially parallel non-contacting relation to said sta ionary electrodes, means on said rod to actuate the movement thereof against the tension of said spring and'swingaloly contact said swinging electrodes with said stationary electrodes, and contact plugs in said cover front compartment mounted on said coverinsulating plate,

' extending forwardly therefrom, arranged 'to seat in said terminal sleeves and make detachable, mechanical and electrical contact therewith to electrically energize said electrodes while said contact is maintained.

Signed at New York in the county of New York and State of New York this 28th day of April, 1928.

' FOCSANEANU ALEXANDER. 

